Cita APA (7th ed.)

Niehans, P. (1966). Cancer prophylaxis. [s.n.].

Cita Chicago (17th ed.)

Niehans, Paul. Cancer Prophylaxis. [London?]: [s.n.], 1966.

Cita MLA (8th ed.)

Niehans, Paul. Cancer Prophylaxis. [s.n.], 1966.